For this trial, vaccine effects were estimated in [1]} assuming a parametric outcome model, and in [2]} assuming that the effect of interference (i.e., infections) between neighborhoods was negligible, and also that non-participants and participants were statistically identical conditioned on observables, with the decision to participate following a logistic form. Our approach will complement these by showing that without these potentially strong assumptions, the reported trends can still be attributed (albeit more weakly) to the effects of the vaccinations.
